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State research · updated July 2026

Replacement Windows in Vermont

Current incentive status, energy-code requirements, and local market research for Vermont homeowners replacing windows and doors.

Rebates & incentives

The federal window tax credit (25C) ended for projects placed in service after December 31, 2025. If your windows were installed in 2025, you can still claim it on your 2025 return — but for new projects there is no federal window credit. State and utility programs are now the main source of window incentives.

Vermont is a national efficiency leader, but its IRA Home Energy Rebates were caught in the 2025 federal funding freeze; the Department of Public Service administers the roughly $58 million allocation, with HOMES delivered mainly to income-qualified households through the state Weatherization Assistance Program and Efficiency Vermont as a partner. State officials have advised not to count on HEAR funds for 2026 projects. Windows would typically qualify only via the whole-home HOMES modeled-savings path, not as a dedicated rebate. Confirm current program status first.

  • Efficiency Vermont weatherization rebates. Efficiency Vermont's 2026 incentives offer generous weatherization support (up to 90% cash back for income-eligible homes), but they target air sealing and insulation — Efficiency Vermont does not offer a standalone window-replacement rebate. Windows matter mostly as part of a comprehensive project; confirm current terms and the November 2026 funding deadline. (EfficiencyVermont.com 2026 rebates announcement)
  • Vermont Weatherization Assistance Program (WAP). The state's income-qualified WAP delivers no-cost whole-home retrofits and can include window or door replacement where cost-effective, alongside air sealing and insulation. Eligibility is income-based; confirm current limits and provider. (publicservice.vermont.gov weatherization / IRA page)

Energy code

Vermont enforces a statewide, mandatory Residential Building Energy Standard (RBES); the 2024 edition builds on the 2018/2021 IECC with more stringent Vermont-specific amendments and requires builder self-certification for new homes, additions, and alterations. The very cold climate (IECC zone 6A) drives low U-factor window requirements.

Local market research in Vermont